From: Yang Jihong yangjihong1@huawei.com
[ Upstream commit 06226d120a28f146abd3637799958a4dc4dbb7a1 ]
When perf_init_event() calls perf_try_init_event() to init pmu driver, searches for the next pmu driver only when the return value is -ENOENT. Therefore, hisi_ptt_pmu_event_init() needs to check the type at the beginning of the function. Otherwise, in the case of perf-task mode, perf_try_init_event() returns -EOPNOTSUPP and skips subsequent pmu drivers, causes perf_init_event() to fail.
Fixes: ff0de066b463 ("hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device") Signed-off-by: Yang Jihong yangjihong1@huawei.com Reviewed-by: Yicong Yang yangyicong@hisilicon.com Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Link: https://lore.kernel.org/r/20240108121906.3514820-1-yangjihong1@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwtracing/ptt/hisi_ptt.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c index a991ecb7515a3..24a1f7797aeb6 100644 --- a/drivers/hwtracing/ptt/hisi_ptt.c +++ b/drivers/hwtracing/ptt/hisi_ptt.c @@ -995,6 +995,9 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event) int ret; u32 val;
+ if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type) + return -ENOENT; + if (event->cpu < 0) { dev_dbg(event->pmu->dev, "Per-task mode not supported\n"); return -EOPNOTSUPP; @@ -1003,9 +1006,6 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event) if (event->attach_state & PERF_ATTACH_TASK) return -EOPNOTSUPP;
- if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type) - return -ENOENT; - ret = hisi_ptt_trace_valid_filter(hisi_ptt, event->attr.config); if (ret < 0) return ret;